Abstract
In the literature, several very natural modal logics have been studied that are weaker than those we have considered thus far. In this chapter we want to take a look at some of them. (For our present purposes, we may think of a modal logic L simply as a certain set of modal formulas, called L-valid, or L-theorems. No particular structure need concern us here. Then weaker is strict subset of.)
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© 1983 Springer Science+Business Media Dordrecht
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Fitting, M. (1983). Non-Normal Logics. In: Proof Methods for Modal and Intuitionistic Logics. Synthese Library, vol 169. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-2794-5_7
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DOI: https://doi.org/10.1007/978-94-017-2794-5_7
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-481-8381-4
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